It’s official: Vitamin D no defence against dementia

Scientists break a commonly held belief that it has neurological benefits

Vitamin D’s role as a protective neurological agent has been further called into question after Australian researchers confirmed there is no evidence it has a positive effect on brain health.

Their systematic review of more than 70 studies found that there is no solid evidence to support the current hypothesis that vitamin D is protective against multiple sclerosis, Parkinson’s disease and Alzheimer’s disease.

However, sun exposure, independent of vitamin D production, may be.

“Our work counters an emerging belief held in some quarters suggesting that higher levels of vitamin D can impact positively on brain health,” says lead author Dr Krystal Iacopetta, PhD candidate at the University of Adelaide.

She notes that past studies had found that patients with a neurodegenerative disease tended to have lower levels of vitamin D compared to healthy controls.

“This led to the hypothesis that

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